Telescoping hoe boom



y 1965 K. w. RANDALL ET AL 3,

TELESGOPING HOE BQOM .3 Sheets-Sheet 1 Filed Aug. 15, 1962 KENNETH W. RANDALL HENRY J. VOS

ATTORNEY y 18, 1965 K. w. RANDALL ET AL 3,184,085

TELESCOPING HOE BOOM Filed Aug. 13, 1962 3 Sheets-Sheet 2 :zi-rgf.

/IIIIIIIIIIIIII' j 24 g I r2 2O 17; P 9n a 26 22 E Q1! 92 r 96 I INVENTOR HENRY J. VOS

ATTORNEY KENNETH W. RANDALL May 18, 1965 K. w. RANDALL ETAL TELESCOPING HOE BOOM 5 Sheets-Sheet 5 Filed Aug. 15, 1962 INVENTOR KENNETH W. RANDALL HENRY J. VOS BY majcfiw M m ATTORNEY United States Patent 3,184,085 TELESCOPING HOE 1300M Kenneth W. Randall, Indianapolis, Ind, and Henry I.

Vos, Grandville, Mich, assiguors to Insley Manufacturing Corporation, Indianapolis, Ind, a corporation of Indiana Filed Aug. 13, 1962, Ser. No. 216,485 3 Claims. (Cl. 214138) The present invent-ion relates to material handling apparatus and more particularly to apparatus for excavating and loading of earth and other bulky material.

It is an object of the invention to produce a material handling machine which is extremely versatile and may be satisfactorily employed as a combination cable and hydraulic hoe, lifting crane, dragline, and clamshell.

Another object of the invention is to produce an excavating and loading apparatus embodying a telescoping boom enabling the flexibility necessary for excavating in close proximities to adjacent obstacles.

Another object of the invention is to produce an excavating and loading apparatus wherein the unloading of the digging bucket is facilitated by specially designed heavy duty stop mechanism for knocking sticky material from the digging bucket.

Still another object of the invention is to produce means for locking the bucket in a digging position and relieving the hydraulic actuating means from any load during the digging.

These and other objectives and advantages of the invention are provided in a material handling machine including a body portion, a bucket arm pivotally mounted relative to the body portion, a shovel bucket, means pivotally mounting the bucket to the bucket arm and means for pivoting the bucket about its pivotal mounting comprising a prime mover carried by the bucket arm, a first arm member pivotally connected at one end to the bucket at a point spaced from the pivotal mounting of the bucket to the bucket arm, a second arm member, means pivotally mounting one end of said second arm member to the bucket at a point spaced from the pivotal mounting of the bucket to the bucket arm, means pivotally interconmeeting the other ends of said first and second arm members and said prime mover, the pivotal connection between said first and second arm members and the pivotal connections of said first and second arm member to the bucket and the bucket arm respectively lying substantially in a rectilinear path when the bucket is in the digging position; and in a machine comprising a body portion, a boom pivotally mounted on said body portion, means for raising and lowering the boom, a bucket arm pivotally mounted to said boom, a shovel bucket, means pivotally mounting the shovel bucket to said bucket arm, means for pivoting said bucket about its pivotal mounting comprising a prime mover carried by the bucket arm, a first arm member pivotally connected at one end to the bucket at a point spaced from the pivotal mounting of the bucket to the bucket arm, a second arm member, means pivotally mounting one end of said second arm member to the bucket at a point spaced from the pivotal mounting of the bucket to the bucket arm, means pivotally interconnecting the other ends of said first and second arm members and said prime mover, the pivotal connection between said first and second arm members and the pivotal connections of said first and second arm members to the bucket and the bucket arm respectively lying substantially in a rectilinear path when the bucket is in the digging position.

Other objects and advantages of the invention will become manifest from reading the following detailed description of a preferred embodiment of the invention in connection with the attached drawings in which:

FIG. 1 is a side elevational view of the excavating and loading apparatus including a telescoping boom having a dipper stick pivotally mounted on the extended end thereof;

FIG. 2 is a front view of the dipper stick arrangement shown in FIG. 1;

FIG. 3 is a sectional view of the telescoping boom taken along line 3--3 of FIG. 1;

PEG. 4 is an enlarged fragmentary view of the mechanism for varying the pitch of the bucket with respect to the dipper stick in which the bucket is shown in a digging position, and

FIG. 5 is an enlarged fragmentary view of the mechanism illustrated in FIG. 4 with the bucket arranged in an unloading or chopping position.

Referring to the drawings and in particular to FIG. 1 thereof, 19 generally designates an improved materialhandling machine embodying the principles of the present invention. The material-handling machine ill generally includes a body portion 12 including an operators cab 14 of conventional configuration. The body portion 12 may be stationary or mobile and mounted on crawler tracks for earth or rail engaging wheel means.

A boom 16 is pivotally mounted, as at 18, through the main frame of the body portion 12. The axis of the pivotal mounting l8 lies in a generally horizontal plane, whereby the boom 16 may be raised or lowered, as is more fully described hereinafter. It will also be appreciated that the boom 16 may also be mounted for pivotal movement about a vertical axis where the body portion 12 is pivotally mounted to its cooperating ground engaging means.

The boom 16 comprises a lower boom portion 2% and an upper boom portion 22. The upper boom portion 22 is telescopically slidable in the upper portion of the lower boom 20 whereby the distance of extension of the boom 16 from the body 12 of the material handling machine may be selectively varied by the machine operator. The means for extending and retracting the upper boom portion 22 relative to the lower boom portion 26' comprises a pressure fluid ram consisting of a ram cylinder 24 mounted in the lower boom portion 2d and a cooperating piston rod 26, the extended end 23 of which is connected as at 38 to the upper boom portion 22. The cylinder 24 is connected adjacent its ends 32 and 34 to a source of pressure fluid. The connecting means include suitable control means as is well known in the art.

A bucket arm, generally designated 36, and composed of a pair of spaced arm members 38 and 3b is pivotally mounted adjacent the extended end of the upper boom portion 22 on a pivoted pin as.

The pair of arm members 38 and 38' are mounted in spaced relationship by a pair of web members 42 and 44 shown more clearly in FIGURES l and 2 of the drawings. The position of the pivot pin 4!? on the arm members 38 and 38' is such that a portion of the arms extends above the pivotal connection and a portion of the arms extends below the pivotal connection. A shackle assembly 48 is pivotally mounted, as at Sit, bet-ween the uppermost end of the pair of spaced arms 33 and 38. The shackle assembly 48 cooperates with sheave means 52 mounted on the extended end of a lagging assembly 54. The lagging assembly 5 includes a mast 56, the lower end of which is pivotally connected to the pivotal connection of the boom 16 to the body portion of the material-handling machine. The upper end of the mast 56 is provided with stabilizing brace means 53. The stabilizing brace means 58 is secured to the body portion of the material handling machine in conventional manner. Flexible draft means 66 interconnects the sheave 62 rotatably mounted at the upper end of the lagging isease assembly, the shackle assembly 48, and a power-driven winch mounted within the body portion of the vehicle, not shown in the drawings.

Secured adjacent the lower ends 64 of the pair of arm members 38 and 38' is a pair of bucket supporting arm members 66 and 66. Between the extended ends of the arms 66 and 66' is pivotally mounted the shovel bucket 68. As more clearly shown in FIGURES 4 and 5 of the drawings, arm 66 is pivotally connected by pivot pin70 to a lug 72 secured to the bucket 68. The other arm 66' is similarly connected to a corresponding lug carried by the other side of the bucket 68. The pair of arms 66 and 66 also carries a sheave assembly 74. It will be particularly noted that the sheave assembly 74 is spaced a substantial distance from the digging edge 75 of the shovel bucket 68 whereby the operation of the drag cable assembly is generally maintained free and clear of bulk material during operation of the materialhandling machine, V

A plurality of plate members 76 are rigidly attached to the closed end 78 of the bucket 68 and generally project thereabove. The plate members 76 receive pin means 80 and mount in spaced relationship a pair of lever arms 82 and 82'. The opposite ends of each of the pair of lever arms 82 and 82' are pivotally connected to pin means 84 carried in a pin mounting 86 secured to the extended end of piston rod 88 of a piston and cylinder unit generally designated 90. A further pair of lever arms 92 and 92 is pivotally connected between the pair of arm members 38 and 38' by pivot pin means 94. Referring particularly to FIG. 4 of the drawings, it will be seen that the pivot pin 70 connecting the bucket 68 to the pair of arms 38 and 38', the pivot pin 30 connecting the pair of lever arms 82 and 82 to the bucket brackets 76 and the pivot pin 94 connecting the lever arms 92 and 92 between the pair of arms 38 and 38' are so positioned in relationship to the length of lever arms 82, 82', 92 and 92, that when the bucket is in the illustrated digging position, pivot pins 80, 84 and 94 are substantially in a straight line. Preferably, the pivotal axis of pivot pin means 84 lies slightly below a rectilinear path between the pivotal axis of pivot pin means 80 and 94, whereby the digging thrust of the 'shovel bucket is transmitted through the linkage to a pair of stop members 96 and 96' rigidly secured to the pair of bucket-supporting arm members 38 and 38. This novel arrangement removes substantially all of the bucket digging thrust from the bucket actuating piston and cylinder unit 90, prompting the employment of a bucket actuating prime mover of substantially lighter construction than heretofore employable on a material handling machine of equivalent material handling capacity. The outermost plate members 76 have rigidly secured thereto stop plates and 100, respectively. The stop members 100 and 100 are disposed in position to engage the lower extended edges of the spaced arm members 38 and 38' when the shovel bucket 68 is in the discharge position as illustrated in FIGURE 5 of the drawings. The stop members 180 and 100' also assist in relieving thrust from the bucket actuating piston and cylinder unit 90 when the bucket is employed in a hoeing operation and the stop members create an efiective jarring action when they contact their respective arms 38 and 38'. This jarring action materially assists in the discharging of material from the shovel bucket.

The upper boom portion 22 mounts a shackle assembly 104. Flexible draft means 106 interconnects the sheave assembly 74 and a power driven winch, not shown, through the shackle assembly 184, whereby when the flexible draft means 106 is pulled in the direction of the directional arrow A (FIGURE 1), the bucket pivoting arm assembly 36 and its attached bucket 68 are urged toward the boom 16. It will be appreciated that during this movement of the bucket pivot arm assembly 36, the flexible draft means 60 is cooperatively unrolled to permit an outward movement of the upper end of the bucket pivoting arms. Movement of the flexible draft means 69 and 106 in the opposite direction to the directional arrow A causes the bucket 68 to move in a direction away from the boom assembly 16. Movement of flexible draft 6%), without a cooperative movement of flexible draft means 106, causes the boom assembly to pivot about pivotal mounting 18 to raise or lower the boom assembly.

From the foregoing description of the present invention, it will be seen by those skilled inthe art that the material-handling machine hereinabove described fully accomplishes the aims and objectives set forth herein. Various modifications may be made in the form of the structures specifically shown in the drawings without departing from the scope of the appended claims. For ex ample, piston and cylinder units 'actuating the linkage for pivoting the bucket 68 about the pivot pin 70, and the piston and cylinder unit for extending and re tracting the extendable boom assembly, may be replaced by rack and pinion means connected to suitable prime movers. 1

We claim:

1. In a material-handling machine including a body portion, a bucket arm pivotally mounted relative to the body portion, a shovel bucket, means pivotally mounting thebucket to the bucket arm and means for pivoting the bucket about its pivotal mounting comprising a linearly extensible prime mover having-one end pivotally carried by the bucket arm, a first arm member pivotally connected at one end to the bucket at a point spaced from the pivotal mounting of the bucket to the bucket arm, a second arm member, means pivotally mounting one end of said second arm member to the bucket arm at a point spaced from the pivotal mounting of the bucket to the bucket arm, means pivotally interconnecting the other ends of said first and second arm members and the other end of said prime mover, and stop members carried by the bucket arm and engageable by said second arm member when the bucket is in the digging position whereby such engagement relieves digging forces from said prime mover.

2. In a material-handling machine including a body portion, a bucket arm pivotally mounted relative to the body portion, a shovel bucket, means pivotally mounting the bucket to the bucket arm and means for pivoting the bucket about its pivotal mounting comprising a linearly extensible prime mover having one end pivotally carried by the bucket arm, a first arm member pivotally connected at one end to the bucket at a point spaced from the pivotal mounting of the bucket to the bucket arm, a second arm member, means pivotally mounting one end of said second arm member to the bucket arm at a point spaced from the pivotal mounting of the bucket to the bucket arm, means pivotally interconnecting the other ends of said first and second arm members and the other end of said prime mover, and stop members carried by the bucket arm-and engageable by said second arm member when the bucket is in the digging position whereby such engagement relieves digging forces from said prime mover, and fur ther stop members carried by the bucket and engageable with the bucket arm when the bucket is in the material discharge position.

3. In a material-handling machine including a body portion, a bucket arm pivotally mounted relative to the body portion, a shovel bucket, means pivotally mount: ing the bucket to the bucket arm and means for pivoting the bucket about its pivotal mounting comprising a linear,- ly extensible prime mover having one end pivotally carried by the bucket arm, a first arm memberpivotally connected at one end to the bucket at a point spaced from the pivotal mounting of the bucket to the bucket arm, a second arm member, means pivotally mounting one end of said second arm member to the bucket arm at a fixed point spaced from the pivotal mounting of the bucket to the bucket arm, means pivotally interconnecting the other ends of said first and second arm members and the other end of said prime mover, the pivotal connection between said first and second arm members and the pivotal connections of said first and second arm member to the bucket and the bucket arm respectively lying substantially in a rectilinear path when the bucket is in the digging position, first stop members carried by the bucket arm and engageable by said second arm member when the bucket is in the digging position whereby such engagement relieves digging forces from said prime mover, and further stop members carried by the bucket and engageable with the bucket arm when the bucket is in the material discharge position.

References Cited by the Examiner UNiTED STATES PATENTS 1,611,195 12/26 Jelen 214-138 1,628,725 5/27 Johnson 214-146 2,603,374 7/52 McNamara 214-140 2,685,973 8/54 Dobeus 214-140 2,784,855 3/57 Acker 14-141 X 2,984,372 5/61 Feriverda 214-138 HUGO O. SCHULZ, Primary Examiner. 

1. IN A MATERIAL-HANDLING MACHINE INCLUDING A BODY PORTION, A BUCKET ARM PIVOTALLY MOUNTED RELATIVE TO THE BODY PORTION, A SHOVEL BUCKET, MEANS PIVOTALLY MOUNTING THE BUCKET TO THE BUCKET ARM AND MEANS FOR PIVOTING THE BUCKET ABOUT ITS PIVOTAL MOUNTING COMPRISING A LINEARLY EXTENSIBLE PRIME MOVER HAVING ONE END PIVOTALLY CARRIED BY THE BUCKET ARM, A FIRST ARM MEMBER PIVOTALLY CONNECTED AT ONE END TO THE BUCKET AT A POINT SPACED FROM THE PIVOTAL MOUNTING OF THE BUCKET TO THE BUCKET ARM, A SECOND ARM MEMBER, MEANS PIVOTALLY MOUNTING ONE END OF SAID SECOND ARM MEMBER TO THE BUCKET ARM AT A POINT SPACED FROM THE PIVOTAL MOUNTING OF THE BUCKET TO THE BUCKET ARM, MEANS PIVOTALLY INTERCONNECTING THE OTHER ENDS OF SAID FIRST AND SECOND ARM MEMBERS AND HE OTHER END OF SAID PRIME MOVER, AND STOP MEMBERS CARRIED BY THE BUCKET ARM AND ENGAGEABLE BY SAID SECOND ARM MEMBER WHEN THE BUCKET IS IN THE DIGGING POSITION WHEREBY SUCH ENGAGEMENT RELIEVES DIGGING FORCES FROM SAID PRIME MOVER. 